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CVE Vulnerability Database
Vulnerability Database/CVE-2025-20785

CVE-2025-20785: Google Android Use-After-Free Vulnerability

CVE-2025-20785 is a use-after-free flaw in Google Android display that enables local privilege escalation to System level. This article covers the technical details, affected versions, security impact, and mitigation.

Updated: May 15, 2026

CVE-2025-20785 Overview

CVE-2025-20785 is a use-after-free vulnerability [CWE-416] affecting the display component on MediaTek chipsets running Google Android 14, 15, and 16. The flaw enables memory corruption that can be leveraged to escalate privileges locally. Exploitation requires an attacker to have already obtained System-level privileges on the device, and no user interaction is necessary. MediaTek addressed the issue under Patch ID ALPS10149882 and Issue ID MSV-4677, published in the MediaTek Security Bulletin January 2026.

Critical Impact

An attacker who already controls a System-privileged process on an affected MediaTek-based Android device can corrupt memory in the display subsystem to escalate further, achieving high impact on confidentiality, integrity, and availability.

Affected Products

  • Google Android 14.0, 15.0, and 16.0
  • MediaTek chipsets including MT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6835, MT6853, MT6855, MT6877, MT6878, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6897, MT6899, MT6983, MT6985, MT6989, and MT6991
  • MediaTek chipsets MT8186, MT8188, MT8196, MT8667, MT8673, MT8676, MT8678, MT8765, MT8766, MT8768, MT8771, MT8781, MT8791T, MT8792, MT8793, MT8795T, MT8796, MT8798, MT8873, and MT8883

Discovery Timeline

  • 2026-01-06 - CVE-2025-20785 published to NVD
  • 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2025-20785

Vulnerability Analysis

The vulnerability resides in the display component used across a wide range of MediaTek system-on-chip (SoC) platforms integrated into Android devices. The flaw is a use-after-free condition, classified under [CWE-416]. Memory associated with a display-related object is freed but a dangling reference remains accessible. Subsequent operations on that reference produce memory corruption inside a privileged kernel or system context.

Because exploitation requires existing System privilege, this is a post-compromise primitive rather than an initial access vector. Attackers typically chain such flaws after gaining a System-level foothold through a separate bug. The resulting corruption enables escalation toward kernel or vendor-driver execution contexts, expanding control over the device.

Root Cause

The root cause is improper lifetime management of an object within the MediaTek display driver stack. A pointer continues to be used after the underlying allocation has been released. The patch identified as ALPS10149882 corrects the reference handling so that freed memory is no longer dereferenced.

Attack Vector

The attack vector is local. An adversary running code at the System privilege level invokes the affected display interface to trigger the freed-object access. No network exposure, user interaction, or social engineering is involved. Successful exploitation yields elevation of privilege beyond System, typically toward kernel-level capability on the target SoC.

No public proof-of-concept exploit is available, and the issue is not listed in the CISA Known Exploited Vulnerabilities catalog. The EPSS score is 0.008%, indicating a low probability of observed exploitation activity in the immediate term.

Detection Methods for CVE-2025-20785

Indicators of Compromise

  • Unexpected crashes, kernel panics, or tombstone files referencing display-related drivers on MediaTek-based Android devices.
  • Anomalous dmesg or logcat entries showing use-after-free signatures, SLUB corruption, or KASAN reports tied to display subsystems.
  • Presence of unknown processes running with System or higher privileges on a managed mobile device.

Detection Strategies

  • Inventory mobile fleet devices and identify those built on the listed MediaTek SoCs running Android 14, 15, or 16 without the January 2026 security patch level.
  • Monitor mobile device management (MDM) telemetry for devices missing the vendor security patch level that incorporates Patch ID ALPS10149882.
  • Correlate crash telemetry from the display HAL and kernel driver against expected baselines to surface exploitation attempts.

Monitoring Recommendations

  • Enforce minimum Android security patch level policy through MDM and block enrollment of non-compliant devices.
  • Review vendor firmware update cadence and confirm OEM delivery of the MediaTek January 2026 bulletin fixes.
  • Track repeated System-privileged process crashes that could indicate exploitation attempts against the display driver.

How to Mitigate CVE-2025-20785

Immediate Actions Required

  • Apply the MediaTek security patch referenced by Patch ID ALPS10149882 once distributed by the device OEM in the January 2026 or later Android security update.
  • Restrict installation of untrusted applications and sideloaded packages that could provide the initial System-level foothold required for exploitation.
  • Audit managed Android devices for those running impacted MediaTek SoCs and prioritize their patch rollout.

Patch Information

MediaTek published the fix in the MediaTek Security Bulletin January 2026 under Patch ID ALPS10149882 and Issue ID MSV-4677. Device OEMs must integrate the patch into their Android security update and deliver it to end users. Confirm the device security patch level reflects January 2026 or later.

Workarounds

  • No vendor-supplied workaround is documented. Patching is the only supported remediation.
  • Reduce attack surface by removing applications that hold elevated permissions and were not vetted by the organization.
  • Where patching is delayed, consider replacing or retiring affected devices that handle sensitive data until firmware updates are available.
bash
# Verify Android security patch level on a managed device
adb shell getprop ro.build.version.security_patch
# Expected output for remediated devices: 2026-01-01 or later

Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.

  • Vulnerability Details
  • TypeUse After Free

  • Vendor/TechGoogle Android

  • SeverityMEDIUM

  • CVSS Score6.7

  • EPSS Probability0.01%

  • Known ExploitedNo
  • CVSS Vector
  • CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
  • Impact Assessment
  • ConfidentialityLow
  • IntegrityNone
  • AvailabilityHigh
  • CWE References
  • CWE-416
  • Vendor Resources
  • MediaTek Security Bulletin January 2026
  • Related CVEs
  • CVE-2026-0121: Google Android Use-After-Free Vulnerability

  • CVE-2026-0027: Google Android Use-After-Free Vulnerability

  • CVE-2026-20442: Google Android Use-After-Free Vulnerability

  • CVE-2026-20443: Google Android Use-After-Free Vulnerability
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